Greg was not, of course, prepared for a firefight; by the time he'd been called in, the scene had supposedly been cleared by the first responders. Of course everyone was meant to be on their guard, but one could usually trust that they'd smoked out all the active and armed suspects, for goodness' sake. He could hear Sally calling for backup from behind a door - the right move, everyone should just be taking cover - and was relieved to see everyone making their way toward the door. He needed to go see that no one had been hit, to make sure that the zone of danger was clear. And then maybe, if they were lucky, they could get everyone out and covered and just wait for the backup to arrive.

But then the kid from forensics darted ahead of him, and for a moment Greg wondered what the hell he was doing until he realized the poor idiot thought he should be following him. Oh, Jesus. He sped up and reached out as the tech ran headlong into the hall, hoping against hopt o grab him. "No, don't -"

There was a shot. Greg felt his shoulder scream with pain as he was toppling onto the tech to try to shove them both to safety into the adjacent doorway; somehow, through the sudden haze of shock he was able to look down and see that the kid wasn't hurt, and to wonder what in hell he was going to do. Wonderful.